data sheet aat4902japan.skyworksinc.com/uploads/documents/202219a.pdfhigh voltage v oh is equal to...

1

AAT4902DATA SHEET

One-Channel Full-Bridge Motor Driver

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com 202219A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 30, 2012

General DescriptionThe AAT4902 is a member of Skyworks' Application Specific Power MOSFET (ASPMTM) product family. It is a full-bridge, constant output voltage power stage operat-ing with supply voltage range of 2.5V to 5.5V. The output states of AAT4902 are controlled by the input signals according to the input to output logic table. The output high voltage VOH is equal to 2.0 times of VLIM (the con-stant voltage setting point voltage) when VLIM ≤ VM/2 or equal to VM (the motor supply voltage) when VLIM > VM/2. AAT4902 is protected from shoot-through current by integrated break-before-make circuitry.

The internal over-temperature protection circuitry turns off the device when an over-temperature fault occurs and recovers automatically when the fault is removed.

The AAT4902 is offered in the Pb-free, 9-pin wafer-level chip-scale package (WLCSP) package and is specified over the -40°C to +85°C temperature range.

Features• Wide Supply Voltage Range

VDD Range: 2.5V to 5.5V VM Range: 2.5V to 5.5V

• One Channel Constant Output Voltage Driver• Low Quiescent Mode

70µA in Quiescent Mode Less than 1µA in Shutdown Mode

• Over-Temperature Protection• ±400mA Maximum Output Current• -40°C to 85°C Temperature Range• WLCSP-9 Package

Applications• Digital Still Cameras (DSCs)• Smart Phones

Typical Application

INA

INB

VDD

VDD

VLIM

Motor

Enable

VLIM

INA

INB

EN

GND

OUTB

OUTA

VM

AAT4902

2.2μF

VM2.2μF

2

AAT4902DATA SHEET



Pin Descriptions

Pin # Symbol DescriptionA1 OUTA Output of the constant voltage H bridge.A2 VM Motor power supply stage.A3 OUTB Output of the constant voltage H bridge

B1 INA Input logic signal to control the output driver stage together with INB according to the input-output table.

B2 PGND Power ground of the output driver stage.

B3 INB Input logic signal to control the output driver stage together with INA according to the input-output table.

C1 VDD Supply voltage for the control circuit.C2 EN Enable control; active high.C3 VLIM Constant output voltage setting signal.

Pin Configuration

WLCSP-9 (Top View)

OUTA

VLIMINBOUTB

ENPGNDVM

VDDINA

A

1

2

3

B C

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AAT4902DATA SHEET



Absolute Maximum Rating TA = 25°C.

Symbol Description Value UnitsVDD Power Supply Voltage -0.3 to 6.0 VVM Motor Power Supply Voltage -0.3 to 6.0 VVIN Control Input Voltage -0.3 to VDD + 0.3 VVLIM Constant-Voltage Setting -0.3 to VM + 0.3 VPD Power Dissipation 704 mW

TOPR Operating Temperature Range -40 to 85 °CTJMAX Junction Temperature 150 °CTSTG Storage Temperature Range -55 to +150 °CIOUT H-Bridge Ouput Current -500 to +500 mA/ch

Thermal Consideration

Symbol Description Value UnitsPD Maximum Power Dissipation 704 mWθJA Thermal Resistance 142 mW/°CTJ Operating Junction Temperature Range -40 to 150 °C

Recommended Operating ConditionsTA =-40°C to +85°C.

Symbol Description Min Typ Max UnitsVDD Power Supply Voltage 2.5 3.0 5.5 VVM Motor Power Supply Voltage 2.5 5.0 5.5 VVIN Control Input Voltage 0 VDD VVLIM Constant-Voltage Setting 0 VM VIOUT H-Bridge Output Current ±400 mA

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AAT4902DATA SHEET



Electrical CharacteristicsTA = 25°C, VDD = 3.0V, VM = 5.0V unless otherwise specified.

Symbol Description Conditions Min Typ Max UnitsIS Shutdown Current VEN = 0 0 1 µA

IOP Operating Current VEN = VINA = VDD, VINB = 0V, IVDD + IVM, No Load 450 µA

IQ Quiescent Current VEN = VDD, VINA = VINB = 0V, IVDD + IVM 70 µA

VINH Input Voltage High 2 VVINL Input Voltage Low 0.7 VIINH High Level Input Current VIN = 3V 15 30 60 µAIINL Low Level Input Current VIN = 0V -1 0 µARIN Pull-down Resistor 50 100 200 kΩIVLIM Constant Voltage Control Input Current -1.5 -0.5 µAVUVLO UVLO Voltage 1.6 2.4 V

RON Output On-Resistance IOUT = ±400mA, VM = 5.0V, high and low sides in total 0.65 1.2 Ω

VOH Output H Voltage VLIM = 1V, 10Ω Load 1.9 2 2.1 VTON Turn-On Time IOUT = ±150mA, 10Ω Load 1.5 3 µsTOFF Turn-Off Time IOUT = ±150mA, 10Ω Load 0.1 1 µsTR Rise Time IOUT = ±150mA, 10Ω Load 0.2 4 µsTF Fall Time IOUT = ±150mA, 10Ω Load 0.02 0.5 µsTSD Over-Temperature Threshold 150 °CTHYS Over-Temperature Hysteresis 15 °C

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AAT4902DATA SHEET



Timing Diagram

Input Logic Signal

IOUT

100%

0%

100%

0%

-100%

50% 50%

90%50%

10%10%

50%90%

10%50%

90%

10%50%90%

TON

TOFF

TF

TR TF TR

TOFF

TON

TBBM

TBBM

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AAT4902DATA SHEET



Typical Characteristics

Operating Current vs. Temperature(VM = 5V; VLIM = 0.75V; VEN = 3V; VINA = 3V; VINB = 0V; No Load)

Temperature (°C)

Ope

ratin

g C

urre

nt (µ

A)

-40 -15 10 35 60 85360

390

420

450

480

510

VDD = 2.5VVDD = 3.6VVDD = 5.5V

Operating Current vs. Power Supply Voltage(VM = 5V; VLIM = 0.75V; VEN = 3V; VINA = 3V; VINB = 0V; No Load)

Power Supply Voltage (V)

Ope

ratin

g C

urre

nt (µ

A)

2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5430

435

440

445

450

455

460

Quiescent Current vs. Temperature(VM = 5V; VLIM = 0.75V; VEN = 3V; VINA = VINB = 0V)

Temperature (°C)

Qui

esce

nt C

urre

nt (µ

A)

-40 -15 10 35 60 8550

60

70

80

90

100


Quiescent Current vs. Power Supply Voltage(VM = 5V; VLIM = 0.75V; VEN = 3V; VINA = VINB = 0V)


Qui

esce

nt C

urre

nt (µ

A)

2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.565

69

73

77

81

85

EN Input High Threshold Voltagevs. Power Supply Voltage

(VM = 5V; VLIM = 1V; VINA = 3V; VINB = 0V)


V EN

(H) (

V)

2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.50.8

1.0

1.2

1.4

1.6

1.8

85°C25°C-40°C

EN Input Low Threshold Voltagevs. Power Supply Voltage

(VM = 5V; VLIM = 1V; VINA = 3V; VINB = 0V)


V EN

(L) (

V)

2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.50.8

1.0

1.2

1.4

1.6

1.8

85°C25°C-40°C

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AAT4902DATA SHEET




INA/B Input High Threshold Voltagevs. Power Supply Voltage

(VM = 5V; VLIM = 1V; VEN = 3V)


V EN

A(H

) (V)

2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.50.8

1.0

1.2

1.4

1.6

1.8

85°C25°C-40°C

INA/B Input Low Threshold Voltagevs. Power Supply Voltage

(VM = 5V; VLIM = 1V; VEN = 3V)


V EN

A(L

) (V)

2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.50.8

1.0

1.2

1.4

1.6

1.8

85°C25°C-40°C

Shutdown Current vs. Temperature(VM = 5V; VLIM = 1V; VEN = VINA = VINB = 0V)

Temperature (°C)

Shut

dow

n C

urre

nt (µ

A)

-40 -15 10 35 60 850.00

0.02

0.04

0.06

0.08

0.10VDD = 2.5VVDD = 5.5V

Output H Voltage vs. VLIM(VM = 5V; VDD = 3V; VEN = VINA = 3V; VINB = 0V)

VLIM (V)

V OH (V

)

0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.50.8

1.4

2.0

2.6

3.2

3.8

4.4

5.0

85°C25°C-40°C

High Side RDS(ON) vs. Temperature(VM = 5V; VLIM = 3V; VEN = VINA = 3V; VINB = 0V; IOUT = 0.4A)

Temperature (°C)

RD

S(O

N)H

(mΩ

)

-40 -15 10 35 60 85250

350

450

550

650

750VDD = 2.5VVDD = 3.6VVDD = 5.5V

Low Side RDS(ON) vs. Temperature(VM = 5V; VLIM = 3V; VEN = VINB = 3V; VINA = 0V; IOUT = 0.4A)

Temperature (°C)

RD

S(O

N)L

(mΩ

)

-40 -15 10 35 60 85150

200

250

300

350

400VDD = 2.5VVDD = 3.6VVDD = 5.5V

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AAT4902DATA SHEET




High Side RDS(ON) vs. Output Current(VM = 5V; VLIM = 3V; VEN = VINA = 3V; VINB = 0V)

Output Current (mA)

RD

S(O

N)H

(mΩ

)

0 80 160 240 320 40040 120 200 280 360300

350

400

450

500

550

600


Low Side RDS(ON) vs. Output Current(VM = 5V; VLIM = 3V; VEN = VINB = 3V; VINA = 0V)

Output Current (mA)

RD

S(O

N)L

(mΩ

)

0 80 160 240 320 40040 120 200 280 360200

220

240

260

280

300


MOSFETs RDS(ON) vs. Power Supply Voltage(VM = 5V; VLIM = 3V; VEN = 3V; IOUT = 0.4A)


RD

S(O

N) (

mΩ

)

2.5 2.8 3.1 3.4 3.7 4.0 4.3 4.6 4.9 5.2 5.5

100

200

300

400

500

600High SideLow Side

Input-Output Logic(VDD = VM = VINA = VINB = VLIM = 3.6V)

Time (400µs/div)

INA(5V/div)

INB(5V/div)

VOUTA(2V/div)

VOUTB(2V/div)

0

0

0

0

Turn On(VDD = VM = 3.6V; VLIM = 0.75V; ILOAD = 150mA)

Time (400ns/div)

INA(2V/div)

VOUTA(1V/div)

IOUT(100mA/div)

0

0

0

Turn Off(VDD = VM = 3.6V; VLIM = 0.75V; ILOAD = 150mA)

Time (40ns/div)

INA(2V/div)

VOUTA(1V/div)

IOUT(100mA/div)

0

0

0

9

AAT4902DATA SHEET



Functional DescriptionThe AAT4902 is a full bridge driver configured with two half bridges. Each half bridge’s high-side MOSFET will be turned on when INA/B is driven high, and the low-side MOSFET will be turned off when INA/B is driven low. Each channel of AAT4902 can supply ±400mA to load. The device operating current is 70μA typical with VDD = VM = 5.0V and no input signal. When the enable pin (EN) is set to low, the device is turned off and the shutdown current is less then 0.1μA. The AAT4902 is protected from shoot-through current by the integrated break-before-make circuitry.

Output H VoltageThe output H voltage (VOH) can be programmed by set-ting the VLIM pin (constant output voltage setting pin): When VLIM ≤ VM/2, the output H voltage (VOH) is equal to 2.0 times VLIM; when VLIM > VM/2, the output H voltage (VOH) approximates VM voltage.

Input-Output Logic TableThe AAT4902 is configured with two input control pins, INA and INB. The control pins are active high to enable the H-bridge outputs. If INA and INB are in anti-phase, the device provides forward/reverse signal to drive the motor.

Table 1 shows the Input-Output logic for the AAT4902.

Input OutputINA INB OUTA OUTBL L L LL H L HH L H LH H Z Z

Table 1: AAT4902 Input-Output Logic Table.

Note: When Z is the Constant-Voltage Driver state both top and bottom power MOSFETs are turned off.

Functional Block Diagram

Logic

UVLO Bandgap andThermal Shutdown

Drive Stage

Sense 1

Sense 2

VDD

EN

INA

INB

VLIM

AGND

PGND

OUTB

OUTA

VM

10

AAT4902DATA SHEET



Application Information

Supply CapacitorThe supply capacitor provides a low impedance loop for the edges of pulsed current drawn by the AAT4902 and reduces the surge current drawn from the input power. A 2.2μF or larger X7R or X5R low ESR/ESL ceramic capacitor is selected for the power supply decoupling. The capacitor should be placed as closely as possible to the VDD pin. This keeps the high frequency content of input current localized, minimizing EMI and supply volt-age ripple.

Output H VoltageThe output H voltage (VOH) can be programmed by set-ting VLIM (constant output voltage setting voltage); the VM voltage should never be exceeded:

VOH = 2.0 · VLIM

(Voltage in V; when VLIM > VM/2, output H voltage is equal to the VM voltage)

For example, if VLIM is 1.0V and VM is 5.0V, then the out-put H voltage (VOH) is 2.0V typical.

Figure 1 shows the relation between the output H volt-age (VOH) and VLIM.

Output H Voltage vs. VLIM(VDD = VM = 5.5V; IOUT = 0; TA = 25°C)

VLIM (V)

Out

put H

Vol

tage

(V)

0 1 2 3 4 5 60

1

2

3

4

5

6

Figure 1: Output H Voltage vs. VLIM.

Shoot-Through ProtectionThe internal high-side and low-side MOSFETs of the AAT4902 cannot conduct at the same time to prevent shoot-through current. When the high-side MOSFET turns on, the low-side MOSFET turns off first; after break-before-make time (TBBM; see Timing Diagram), the high-side MOSFET then turns on. Similarly, before the low-side MOSFET turns on, the high-side MOSFET turns off; after a certain break-before-make time (TBBM), the low-side MOSFET turns on. The dead time between the high-side and low-side turn-on should be kept as low as possible to minimize current flows through tbe body diode of the high-side and/or low-side MOSFET(s). The break-before-make shoot-through protection significantly reduces losses associated with the driver at high frequency.

Over-Temperature ProtectionOver-temperature protection is active and disables the AAT4902 when the die temperature of the device exceeds tSD (150°C). When the fault is removed by the die tem-perature dropping below tSD minus the hysteresis of 15°C, the AAT4902 automatically recovers to normal operation.

Thermal CalculationsThe AAT4902 can provide ±400mA output current to drive a motor. The limiting characteristic for the maxi-mum output power is essentially package power dissipa-tion and the device's internal thermal limit. At any given ambient temperature (TA), the maximum package power dissipation can be determined by the following equation:

TJ(MAX) - TA

ΘJA PD(MAX) =

Where:

TJ (MAX) = junction temperature of the die (125°C)TA = ambient temperature (25°C)θJA = thermal resistance (142°C/W)

11

AAT4902DATA SHEET



Typical Application Circuit

INA

INB

VDD

2.5 - 5.5V

VDD

VLIM

DC Motor

Enable

VLIM

INA

INB

EN

GND

OUTB

OUTA

VM

AAT4902

CIN

2.2μF

VM

2.5 - 5.5V CIN

2.2μF

M

Figure 2: Full Bridge Motor Driver Application Using AAT4902.

Evaluation Board Schematic

CIN

2.2μF

INA

INB

VDD

R1VLIM

Motor

OUTA

OUTB

VM

EN

J1

C12.2μF

M1

GND

GND

M2

M3

M4VLIM

C3

INAB1

INBB3

ENC2

GNDB2

VDDC1

OUTBA3

OUTAA1

VMA2

AAT4902U1

U1: AAT4902IURC1, CIN: 0603 X7R 2.2μF 10V GRM188R71A225KE15

Figure 3: AAT4902 Evaluation Board Schematic.

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AAT4902DATA SHEET



Evaluation Board Layout

Figure 4: AAT4902 Evaluation Board Figure 5: AAT4902 Evaluation Board Top Side Layout. Top Side Layout (detail).

Figure 6: AAT4902 Evaluation Board Bottom Side Layout.

13

AAT4902DATA SHEET



Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved.

Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. Sky-works may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes.

No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided here-under, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale.

THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, IN-CLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or en-vironmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale.

Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of products outside of pub-lished parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters.

Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference.

1 .YY = date code.2 .Sample stock is generally held on part number listed in BOLD.

Ordering information

Package Marking1 Part Number (Tape and Reel)2

WLCSP-9 E9YY AAT4902IUR-T1

Skyworks Green™ products are compliant with all applicable legislation and are halogen-free.For additional information, refer to Skyworks Definition of Green™, document number SQ04-0074.

Package Information

WLCSP-9

0.800 BSC

0.40

0 B

SC

1.20

0 ±

0.03

5

1.200 ± 0.035

0.80

0 B

SC

0.30

00.

100

0.3000.100

0.2 (Ref.)Pin 1 Indication

Line 1Line 2

Bottom View

Side View

Top View

0.205 ± 0.025

0.62

0 ±

0.08

5

0.380 ± 0.025

0.170 ± 0.025

0.070 ± 0.035

All dimensions in millimeters.

data sheet aat4902japan.skyworksinc.com/uploads/documents/202219a.pdfhigh voltage v oh is equal to...

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